Discard all lintian-overrides.

The extra-license-file warning, which was the last lintian override,
was resolved by upstream commit d69b2dee714f732300c6db12b7af48b4f86d67ee.

Any other lintian messages are still pertinent.
Housecleaning for master branch split.

The monolithic pkg-zfs/master branch is splitting into one branch for
each supported build target. Currently wheezy, precise, quantal, and
raring.

The debian/NEWS and debian/changelog files are deleted here so that
the history is discontinuous, which should better accomodate build
automation using things like `git-dch --snapshot` and `git-pbuilder`.

Also bump the standards-version to 3.9.3 and remove quirks for Lucid,
which is going out of support soon. Ubuntu 12.04 Precise Pangolin is
now the touchstone platform.
Create a git attributes file in the overlay.

And set the `merge=ours` strategy on the `debian/changelog` and
`debian/NEWS` files, which should never have a shared history.

Rather, when one `master/*` branch is merged into another, this should
prevent the accidental cross contamination of unrelated objects.